1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
package jogamp.opengl.glu.nurbs;
/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 2.0 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
*/
/**
* Class holding trimming arcs
* @author Tomas Hrasky
*
*/
public class Bin {
/**
* Head of linked list of arcs
*/
private Arc head;
/**
* Current arc
*/
private Arc current;
/**
* Indicates whether there are any Arcs in linked list
* @return true if there are any Arcs in linked list
*/
public boolean isnonempty() {
// DONE
return this.head != null ? true : false;
}
/**
* Adds and arc to linked list
* @param jarc added arc
*/
public void addarc(final Arc jarc) {
// DONE
// if (head == null)
// head = jarc;
// else {
jarc.link = head;
head = jarc;
// }
}
/**
* Returns number of arcs in linked list
* @return number of arcs
*/
public int numarcs() {
// DONE
int count = 0;
for (Arc jarc = firstarc(); jarc != null; jarc = nextarc())
count++;
return count;
}
/**
* Removes first arc in list
* @return new linked list head
*/
public Arc removearc() {
// DONE
final Arc jarc = head;
if (jarc != null)
head = jarc.link;
return jarc;
}
/**
* Consolidates linked list
*/
public void adopt() {
// DONE
markall();
Arc orphan;
while ((orphan = removearc()) != null) {
for (Arc parent = orphan.next; !parent.equals(orphan); parent = parent.next) {
if (!parent.ismarked()) {
orphan.link = parent.link;
parent.link = orphan;
orphan.clearmark();
break;
}
}
}
}
/**
* Marks all arc in linked list
*/
private void markall() {
// DONE
for (Arc jarc = firstarc(); jarc != null; jarc = nextarc())
jarc.setmark();
}
/**
* Returns first arc in linked list
* @return first arc in linked list
*/
private Arc firstarc() {
// DONE
current = head;
return nextarc();
}
/**
* Returns next arc in linked list
* @return next arc
*
*/
private Arc nextarc() {
// DONE
final Arc jarc = current;
if (jarc != null)
current = jarc.link;
return jarc;
}
}
|
